--- a/handouts/ho04.tex	Tue Oct 04 15:09:08 2016 +0100
+++ b/handouts/ho04.tex	Fri Oct 07 22:08:03 2016 +0100
@@ -537,7 +537,7 @@
 
 \noindent This completes the high-level version of the simplification
 function, which is shown again in Figure~\ref{simp}. The Scala code
-for the simplifaction function is in Figure~\ref{simprect}.
+for the simplification function is in Figure~\ref{simprect}.
 
 \begin{figure}[t]
 \begin{center}